04
2022
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01
Analysis of Errors Affecting the Contact Accuracy in Gear Processing
Author:
The contact conditions of the gear tooth surfaces usually have a direct impact on the uniformity of load distribution in gear transmission. During rolling teeth, the main reasons affecting the contact accuracy in the tooth height direction are the tooth shape tolerance △ff and the base surface limit deviation △fpb. The main reason affecting the contact accuracy in the tooth width direction is the tooth direction tolerance △Fβ. The main causes of tooth direction tolerance are: 1. There is a parallelism error between the guide rail of the gear hobbing machine's tool holder and the rotation axis of the worktable. 2. The assembly deviation of the gear blank caused by the runout of the spindle and the non-parallelism of the bottom surface of the gear blank and the two end surfaces of the washer can lead to gear positioning errors. 3. When rolling helical gears, in addition to the aforementioned influencing factors, the calculation error of the machine tool's differential gears can also have a certain impact on the tooth difference of the gear.
The contact conditions of the gear tooth surfaces usually have a direct impact on the uniformity of load distribution in gear transmission. When rolling gears, the main reason affecting the contact accuracy in the tooth height direction is the tooth shape tolerance △ff and the base surface limit deviation △fpb. The main reason affecting the contact accuracy in the tooth width direction is the tooth direction tolerance △Fβ. The main reasons for the tooth direction tolerance are:
1. There is a parallelism error between the guide rail of the gear hobbing machine and the rotation axis of the workbench. 2. The assembly deviation of the gear blank caused by the runout of the center shaft and the non-parallelism of the bottom surface of the gear blank and the two end surfaces of the washer can lead to gear positioning errors. 3. When rolling cut helical gears, in addition to the influencing factors mentioned above, the calculation error of the machine tool's differential gears can also have a certain impact on the tooth difference of the gear.
Gear, Tolerance
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